Hammer



P. LUCAS HAMMER Filed Jan. 4, '1923 Patented ay 29, 1923.

GEORGE I. LUCAS, 0F JERSEY CITY, NEW JERSEY.

HER.

Application filed January 4, 1923; Serial No. 610,628.

To all whom it may concern Be it known that I Gnonon P. LUCAS, a citizen of the United states of America, residing at Jersey City, county of Hudson,

2 State of New Jersey, have invented certain new and useful Improvements in Hammers, of which the following is a specification.

This invention relates to hammers and particularly to hammers'of the centrifugal provide a form of joint for the removable head to afford simplicity of casting, ready machinery of any of the parts if necessar to simplify the assembly of the removab e head on the arm of the hammer and the replacement of the head when desired.

Further features and objects of the invention will be more fully understood from the following detail-description and the accompanying drawings, in which I F 1g. 1 is a, perspective view of a hammer of the centrifugal type, provided with a removable head embodying my invention;

F ig. 2 is a perspective view of the head of the hammer shown in Fig. 1; and

Fig. 3 is a. perspective view of the arm of the. hammer shown in Fig. 1.

Referring to the drawings;, the hammer illustrated is of the centrifugal type and comprises generally the arm 10 having the pivot opening 11 for mounting the arm in the centrifugal device of the centrifugal mill, crushing machines or the like.

The head 12 of the hammer is preferably of lateral extension relative to the length of the hammer, that is to say, of the type shown in m aforesaid copending application Serial o. 582,887.

Preferably, the joint between the removable head. 12 and the arm 10 is by means of wedge connection of the tongue and groove type. the wedge member being carried by the head and the groove member carried by the arm, or conversely the wedge member may be carried by the arm and the groove member .carried by the head.

Such tongue and groove connection, as

illustrated in thedrawings, comprises preferably a wedge-shaped tongue 1% carried by the removable head 12, tapering longitudinally and transversely, that is to say, the

width of the edge 15 at the outer free end of the length of the tongue 14 is less than the width of the edge 16, and the thickness of the tongue at the location 17 isless thanthe width of the edge 16. The groove 19 car-.

ried by the arm 10 of the hammer may be correspondingly shaped, that is to say, the width 'of the edge 21 is greater than the width of the edge 22, thereby giving rise to the longitudinal taper, and the width of the opening at the location 23 is less than the width of the edge 21, thereby giving rise to transverse tapering of the groove or'slot 20.'

To effect the joint of the head and its arm, the end 24.- of the tongue 14 is first passed into the groove 20 of the arm 10 and the. tongue is pushed into the groove until it is fully seated therein.

Preferably, the head is formed as set forth in my aforesaid copending application, Serial No. 582,887, that is to say, upon fully seating the tongue 14 in its groove 20, the inner face 26 of the tail portion 25 is brought in plane to plane contact with the lateral face 27 of the lower, thickened portion of the arm 10.

To secure additional lodgment of the re- I movable head 12 on its arm 10, the tail portion 25 is provided with the abutment lug. 28 and the lateral face 27 of the arm 10 with a correspondingnhutment groove 29; such lug 28 and groove 29 may be semi-circular as indicated in the drawings.

If desired, thetongue and groove conned tion may be provided with openings for receiving a connecting pin,)and to this end,

the oppositelydisposed-operiings 30, in

alignment with one another, are located in the walls of the groove or slot 20 and the opening 31 located in the tongue, at a position to be brought in register with the openings 3O, to receive the connecting pin 32, see Fig. 1.

From the above, it Will be perceived that in the use of the hammer for crushing coke -or like material, as in centrifugal crushers,

mills and the like, the degree of mutual engagement between the removable head and its arm is enhanced by the impacts received in the crushing operation, "whereby the wedge 14 is more and more firmly seated within its .groove 20. The abutment lug 28 e morcmenl'oi' in iinnslll groove onnzmtion, as net we presents to ready machining or other lin by reason nil l hillimil portion of i y of ll}? dirrxliion oi" length he hammer the elleciive of llle liamz'ner head is increased nltial longitudinal extension .Qi' as a whole. lined in the drawings, the forces to which llie head and its n'rm inert-led are rewlvahle in directions at l-'5 in the plane of the oints of i l between the neudof the hamrnerchy relieving he tongue animating parts of substanngg forces. The provision of ad .end of? ihe hummer at the nd groove mime i on and the head relative y to Elie arm as a ahnz ill. momentum n? she haml or Speeds of rotalion oi i ce' The provision of the e-icen'; gmrlions of lire arm and refiners illc exlenl of wear "sing faces, .a 1 olive :lznecrihcd my invczdion rence lo Specific forms thereof it, will zonal filial, many changes and modil -II 2 be made without departing frern no spirii of the invention.

'1 cl lm miner fnr zz centrifugal devicn com- 2 arm provided adjacent one end 4. in an opening for pivotal suspenrne eniendingz at ene of its lelerzil zb-elrlniielly rerlilineerly for 3% entire nn oosite ezd of said arm being: I, an znrule angle and provided ilfif'fl' gre-o's'e, and a removable material n? greater refrain:- .r L r than the nmtrrlal of field I ll ed having Al; one end thereof a iifilfll'l exlemling snhsmniinlly en Jr lengil: if sai logagmsile end of said mngs'irncied lie he received within said 9 ell grown or sand n'rni said head lursembled on said arm and in face to face engagement with said lateral longitudinally extending face of said arm.

2. A hammer for a centrifu al device comprising an arm provided ad acent one end thereof with an opening for pivotal susmnsioinnaid arm extending at one of its lateral faces substantially rectilincarly for its cniire length, the opposite end of said arm heing rut away at an acute angle and provided with n dove-tail groove, and a removable head formed of nniberial of .grealer refractory character thunthe mate- 'ial of said urnn said hcad having at one end thereof a dove-tail projeotion extending substantially-the full length of said opposite and of said arm constructed lo he rc} ceived within said (lore-tail groove of said arm, said head further including pr0jcclion extending laterally of said arm when said head is :issumhled on said arm and in face lo face engagement with said lateral longitudinally extendin face of said arm. llie free end of said heaclhein enlarged and extending laterally and in in Vance of said rectilinear lateral face of said arm. 3. A hammer for a centrifugal device comprising; an arm provided adjacentone end thereof will: an opening for pivotal susncnsion, said eri'n extending at one of its lateral faces suhsmntially rertilinearlv for its entire length, the opposite end of said arm being cut away for its full length at an acute angle and provided ior its full length with a dove-tail groove, and a removable ln leslimony whereof l have signed this specification this 30th day of llecemlrer 1922.

GEORGE P. wells. 

